$ git clone -n https://src.fedoraproject.org/rpms/gnome-session.git /var/lib/mock/f41-build-855210-167084/root/chroot_tmpdir/scmroot/gnome-session
Cloning into '/var/lib/mock/f41-build-855210-167084/root/chroot_tmpdir/scmroot/gnome-session'...
$ git fetch origin 6e2d2ae0bd09d62363d81ca1c5e6702ccba6f822:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnome-session
 * [new ref]         6e2d2ae0bd09d62363d81ca1c5e6702ccba6f822 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6e2d2ae Update to 47.0.1