$ git clone -n https://src.fedoraproject.org/rpms/saclib.git /var/lib/mock/f40-build-790439-136584/root/chroot_tmpdir/scmroot/saclib
Cloning into '/var/lib/mock/f40-build-790439-136584/root/chroot_tmpdir/scmroot/saclib'...
$ git fetch origin 3f5634381a42ec48d423b7471dda0ef77e4ece13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/saclib
 * [new ref]         3f5634381a42ec48d423b7471dda0ef77e4ece13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3f56343 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild