$ git clone -n https://src.fedoraproject.org/rpms/rng-tools.git /var/lib/mock/f39-build-1490071-34503/root/chroot_tmpdir/scmroot/rng-tools
Cloning into '/var/lib/mock/f39-build-1490071-34503/root/chroot_tmpdir/scmroot/rng-tools'...
$ git fetch origin afcfc3c0be40b5d1041bd314b3d80ffd50a569cd:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rng-tools
 * [new ref]         afcfc3c0be40b5d1041bd314b3d80ffd50a569cd -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at afcfc3c Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild