$ git clone -n https://src.fedoraproject.org/rpms/libselinux.git /var/lib/mock/f42-build-867460-175508/root/chroot_tmpdir/scmroot/libselinux
Cloning into '/var/lib/mock/f42-build-867460-175508/root/chroot_tmpdir/scmroot/libselinux'...
$ git fetch origin 0aafc79645d4c8aac0e4153282398320e0e797f7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libselinux
 * [new ref]         0aafc79645d4c8aac0e4153282398320e0e797f7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0aafc79 Rebuilt for the bin-sbin merge (2nd attempt)