$ git clone -n https://src.fedoraproject.org/rpms/methane.git /var/lib/mock/f45-build-18317-513/root/chroot_tmpdir/scmroot/methane
Cloning into '/var/lib/mock/f45-build-18317-513/root/chroot_tmpdir/scmroot/methane'...
$ git fetch origin 27a7be36bab6a28ffd769a214c41e131fd9c9ecb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/methane
 * [new ref]         27a7be36bab6a28ffd769a214c41e131fd9c9ecb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27a7be3 Fix s390x FTBFS