$ git clone -n https://src.fedoraproject.org/rpms/golang-github-a8m-tree.git /var/lib/mock/f40-build-781580-131728/root/chroot_tmpdir/scmroot/golang-github-a8m-tree
Cloning into '/var/lib/mock/f40-build-781580-131728/root/chroot_tmpdir/scmroot/golang-github-a8m-tree'...
$ git fetch origin b8043b37e4205e1ced9f29288a9a96c04ee3c708:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-a8m-tree
 * [new ref]         b8043b37e4205e1ced9f29288a9a96c04ee3c708 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b8043b3 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild