$ git clone -n https://src.fedoraproject.org/rpms/prboom.git /var/lib/mock/f39-build-1551587-36981/root/chroot_tmpdir/scmroot/prboom
Cloning into '/var/lib/mock/f39-build-1551587-36981/root/chroot_tmpdir/scmroot/prboom'...
$ git fetch origin cb110880898479d1de98c6a3a99015c6bc09d0f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/prboom
 * [new ref]         cb110880898479d1de98c6a3a99015c6bc09d0f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cb11088 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild