$ git clone -n https://src.fedoraproject.org/rpms/python-specfile.git /var/lib/mock/f40-build-1465645-23661/root/chroot_tmpdir/scmroot/python-specfile
Cloning into '/var/lib/mock/f40-build-1465645-23661/root/chroot_tmpdir/scmroot/python-specfile'...
$ git fetch origin 3be0cbabdd0b6e04121aef3614362a7a9c447cee:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-specfile
 * [new ref]         3be0cbabdd0b6e04121aef3614362a7a9c447cee -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3be0cba Update to 0.31.0 upstream release