$ git clone -n https://src.fedoraproject.org/rpms/rubygem-activemodel.git /var/lib/mock/f40-build-2550159-61947/root/chroot_tmpdir/scmroot/rubygem-activemodel
Cloning into '/var/lib/mock/f40-build-2550159-61947/root/chroot_tmpdir/scmroot/rubygem-activemodel'...
$ git fetch origin 22365419c5fb07e06a8c9ce4986e57d9cbb4ddf7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rubygem-activemodel
 * [new ref]         22365419c5fb07e06a8c9ce4986e57d9cbb4ddf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2236541 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild