$ git clone -n https://src.fedoraproject.org/rpms/xblas.git /var/lib/mock/f41-build-755430-13413/root/chroot_tmpdir/scmroot/xblas
Cloning into '/var/lib/mock/f41-build-755430-13413/root/chroot_tmpdir/scmroot/xblas'...
$ git fetch origin 1f8a8198fe317d8c376b13b6b38fe60804b8efc9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/xblas
 * [new ref]         1f8a8198fe317d8c376b13b6b38fe60804b8efc9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1f8a819 Eliminate use of obsolete %patchN syntax (#2283636)