$ git clone -n https://src.fedoraproject.org/rpms/zmat.git /var/lib/mock/f41-build-2044735-25295/root/chroot_tmpdir/scmroot/zmat
Cloning into '/var/lib/mock/f41-build-2044735-25295/root/chroot_tmpdir/scmroot/zmat'...
$ git fetch origin 7ad2df73a0d68683b66fcc0af0cc0544185eb3be:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/zmat
 * [new ref]         7ad2df73a0d68683b66fcc0af0cc0544185eb3be -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7ad2df7 convert GPLv3+ license to SPDX