$ git clone -n https://src.fedoraproject.org/rpms/ghc-th-compat.git /var/lib/mock/f41-build-839478-160201/root/chroot_tmpdir/scmroot/ghc-th-compat
Cloning into '/var/lib/mock/f41-build-839478-160201/root/chroot_tmpdir/scmroot/ghc-th-compat'...
$ git fetch origin 3ac5ae0065186a290fd735572d0120ac6241f706:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-th-compat
 * [new ref]         3ac5ae0065186a290fd735572d0120ac6241f706 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ac5ae0 https://hackage.haskell.org/package/th-compat-0.1.5/changelog