$ git clone -n https://src.fedoraproject.org/rpms/python-graph-tool.git /var/lib/mock/f41-build-1018506-17947/root/chroot_tmpdir/scmroot/python-graph-tool
Cloning into '/var/lib/mock/f41-build-1018506-17947/root/chroot_tmpdir/scmroot/python-graph-tool'...
$ git fetch origin e47430cf58337363885e6102f502b78be87b2270:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-graph-tool
 * [new ref]         e47430cf58337363885e6102f502b78be87b2270 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e47430c feat: update to 2.69 (fixes rh#2291158)