$ git clone -n https://src.fedoraproject.org/rpms/ghc-hslogger.git /var/lib/mock/f39-build-1507470-35263/root/chroot_tmpdir/scmroot/ghc-hslogger
Cloning into '/var/lib/mock/f39-build-1507470-35263/root/chroot_tmpdir/scmroot/ghc-hslogger'...
$ git fetch origin 3fd19a6d086d94fd31876a2e97b784646c0f0a0d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-hslogger
 * [new ref]         3fd19a6d086d94fd31876a2e97b784646c0f0a0d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3fd19a6 revised .cabal file