$ git clone -n https://src.fedoraproject.org/rpms/rust-av1-grain.git /var/lib/mock/f38-build-side-42-init-devel-1396185-31050/root/chroot_tmpdir/scmroot/rust-av1-grain
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1396185-31050/root/chroot_tmpdir/scmroot/rust-av1-grain'...
$ git fetch origin ded6f7aaf16ad6062e38ca029a2179ee7cdda42b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-av1-grain
 * [new ref]         ded6f7aaf16ad6062e38ca029a2179ee7cdda42b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ded6f7a Initial import (#2217974)