$ git clone -n https://src.fedoraproject.org/rpms/MUMPS.git /var/lib/mock/f42-build-3361304-41426/root/chroot_tmpdir/scmroot/MUMPS
Cloning into '/var/lib/mock/f42-build-3361304-41426/root/chroot_tmpdir/scmroot/MUMPS'...
$ git fetch origin 405b87098509f25f64c4a1ee256d47358d7dc659:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/MUMPS
 * [new ref]         405b87098509f25f64c4a1ee256d47358d7dc659 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 405b870 Rebuild for scalapack SONAME change.