$ git clone -n https://src.fedoraproject.org/rpms/rubygem-gtk2.git /var/lib/mock/f41-build-819795-151905/root/chroot_tmpdir/scmroot/rubygem-gtk2
Cloning into '/var/lib/mock/f41-build-819795-151905/root/chroot_tmpdir/scmroot/rubygem-gtk2'...
$ git fetch origin 91631d9aada80413f825970b5ec14112d3fe3128:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-gtk2
 * [new ref]         91631d9aada80413f825970b5ec14112d3fe3128 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 91631d9 Rebuilt for https://fedoraproject.org/wiki/Fedora_41_Mass_Rebuild