$ git clone -n https://src.fedoraproject.org/rpms/python-xcffib.git /var/lib/mock/f40-build-2232269-53329/root/chroot_tmpdir/scmroot/python-xcffib
Cloning into '/var/lib/mock/f40-build-2232269-53329/root/chroot_tmpdir/scmroot/python-xcffib'...
$ git fetch origin 0403217d34cfb697b7f6f63622411fd94dc1d231:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-xcffib
 * [new ref]         0403217d34cfb697b7f6f63622411fd94dc1d231 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0403217 Update to 1.5.0