I tried to follow instructions on https://crux-arm.nu/Documentation/PkgutilsCross:

2. Build pkgutils-cross

 $ cd /devel/crux-arm
 $ git clone git://crux-arm.nu/crux-arm/pkgutils-cross.git
 $ cd pkgutils-cross
 $ git branch 3.3 origin/3.3
 $ git checkout 3.3
 $ make

[matt@tegers devel]# git clone git://crux-arm.nu/crux-arm/pkgutils-cross.git
Cloning into 'pkgutils-cross'...
remote: Counting objects: 587, done.
remote: Compressing objects: 100% (379/379), done.
remote: Total 587 (delta 381), reused 294 (delta 203)
Receiving objects: 100% (587/587), 244.67 KiB | 347.00 KiB/s, done.
Resolving deltas: 100% (381/381), done.
Checking connectivity... done.
[matt@tegers devel]# cd pkgutils-cross/
[matt@tegers pkgutils-cross]# git branch 3.3 origin/3.3
fatal: Not a valid object name: 'origin/3.3'.
[matt@tegers pkgutils-cross]# git branch 3.2 origin/3.2
Branch 3.2 set up to track remote branch 3.2 from origin.
[matt@tegers pkgutils-cross]# git checkout 3.2
Switched to branch '3.2'
Your branch is up-to-date with 'origin/3.2'.