$ git clone -n https://src.fedoraproject.org/rpms/python-systemd.git /var/lib/mock/f40-build-2247142-53850/root/chroot_tmpdir/scmroot/python-systemd
Cloning into '/var/lib/mock/f40-build-2247142-53850/root/chroot_tmpdir/scmroot/python-systemd'...
$ git fetch origin 87ad8557a98b4e7d9b29c0dc73c6228660030400:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-systemd
 * [new ref]         87ad8557a98b4e7d9b29c0dc73c6228660030400 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 87ad855 Don't recommend python-systemd-doc which pulls in 3 packages