$ git clone -n https://src.fedoraproject.org/rpms/python-graph-tool.git /var/lib/mock/f40-build-735536-106446/root/chroot_tmpdir/scmroot/python-graph-tool
Cloning into '/var/lib/mock/f40-build-735536-106446/root/chroot_tmpdir/scmroot/python-graph-tool'...
$ git fetch origin ea33a0760028f28536d8e072280f3d9a42009bc4:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-graph-tool
 * [new ref]         ea33a0760028f28536d8e072280f3d9a42009bc4 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea33a07 Break a long line in the spec file