$ git clone -n https://src.fedoraproject.org/rpms/GMT.git /var/lib/mock/f41-build-812159-147723/root/chroot_tmpdir/scmroot/GMT
Cloning into '/var/lib/mock/f41-build-812159-147723/root/chroot_tmpdir/scmroot/GMT'...
$ git fetch origin 01f7f838609086b1f771068221a330a04f9dee08:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/GMT
 * [new ref]         01f7f838609086b1f771068221a330a04f9dee08 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 01f7f83 Rebuild (gdal)