$ git clone -n https://src.fedoraproject.org/rpms/cinnamon-session.git /var/lib/mock/f41-build-1034473-18634/root/chroot_tmpdir/scmroot/cinnamon-session
Cloning into '/var/lib/mock/f41-build-1034473-18634/root/chroot_tmpdir/scmroot/cinnamon-session'...
$ git fetch origin b33755c700f3351eb713916263af5371dbfd3c00:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cinnamon-session
 * [new ref]         b33755c700f3351eb713916263af5371dbfd3c00 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b33755c Remove polkit-gnome requires