$ git clone -n https://src.fedoraproject.org/rpms/python-wikitcms.git /var/lib/mock/f42-build-side-1-3500274-45970/root/chroot_tmpdir/scmroot/python-wikitcms
Cloning into '/var/lib/mock/f42-build-side-1-3500274-45970/root/chroot_tmpdir/scmroot/python-wikitcms'...
$ git fetch origin 4fb6c677609dd9c2723dbd511a0a584d0e4eec78:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/python-wikitcms
 * [new ref]         4fb6c677609dd9c2723dbd511a0a584d0e4eec78 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4fb6c67 Merge branch 'f40' into rawhide