$ git clone -n https://src.fedoraproject.org/rpms/oclock.git /var/lib/mock/f45-build-20854-574/root/chroot_tmpdir/scmroot/oclock
Cloning into '/var/lib/mock/f45-build-20854-574/root/chroot_tmpdir/scmroot/oclock'...
$ git fetch origin ce90329951a3be0dab421766b1b988dec91983d8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/oclock
 * [new ref]         ce90329951a3be0dab421766b1b988dec91983d8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ce90329 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild