$ git clone -n https://src.fedoraproject.org/rpms/ghc-skylighting.git /var/lib/mock/f39-build-1711878-41228/root/chroot_tmpdir/scmroot/ghc-skylighting
Cloning into '/var/lib/mock/f39-build-1711878-41228/root/chroot_tmpdir/scmroot/ghc-skylighting'...
$ git fetch origin d2d6f7b76b3ca698677b59c8667bc2f683a85e9b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-skylighting
 * [new ref]         d2d6f7b76b3ca698677b59c8667bc2f683a85e9b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d2d6f7b update to 0.13.4.1