$ git clone -n https://src.fedoraproject.org/rpms/gzip.git /var/lib/mock/f39-build-1437066-32116/root/chroot_tmpdir/scmroot/gzip
Cloning into '/var/lib/mock/f39-build-1437066-32116/root/chroot_tmpdir/scmroot/gzip'...
$ git fetch origin 6aab49deb09b9f279624f26693b20bb63d804258:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gzip
 * [new ref]         6aab49deb09b9f279624f26693b20bb63d804258 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6aab49d Enable the s390x optimizations