$ git clone -n https://src.fedoraproject.org/rpms/cachelib.git /var/lib/mock/f39-build-2551420-61915/root/chroot_tmpdir/scmroot/cachelib
Cloning into '/var/lib/mock/f39-build-2551420-61915/root/chroot_tmpdir/scmroot/cachelib'...
$ git fetch origin a92afc6ac0cf974c0406fc7d00fb15829698c789:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cachelib
 * [new ref]         a92afc6ac0cf974c0406fc7d00fb15829698c789 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a92afc6 Update to 2023.10.16.00