$ git clone -n https://src.fedoraproject.org/rpms/rocs.git /var/lib/mock/f38-build-side-42-init-devel-840085-28411/root/chroot_tmpdir/scmroot/rocs
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-840085-28411/root/chroot_tmpdir/scmroot/rocs'...
$ git fetch origin e6b12b35c225b1d1c53f430ccac165fbc049396f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rocs
 * [new ref]         e6b12b35c225b1d1c53f430ccac165fbc049396f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e6b12b3 Rebuild (grantlee-qt5)