$ git clone -n https://src.fedoraproject.org/rpms/umockdev.git /var/lib/mock/f40-build-788750-135315/root/chroot_tmpdir/scmroot/umockdev
Cloning into '/var/lib/mock/f40-build-788750-135315/root/chroot_tmpdir/scmroot/umockdev'...
$ git fetch origin e66a8b4dbab6309e738d5887e1ca23fa370db288:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/umockdev
 * [new ref]         e66a8b4dbab6309e738d5887e1ca23fa370db288 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e66a8b4 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild