$ git clone -n https://src.fedoraproject.org/rpms/ghc-cmark.git /var/lib/mock/f41-build-838874-159867/root/chroot_tmpdir/scmroot/ghc-cmark
Cloning into '/var/lib/mock/f41-build-838874-159867/root/chroot_tmpdir/scmroot/ghc-cmark'...
$ git fetch origin 7d274fce26adc6f28bfd8d3ecfa35826fd52178d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-cmark
 * [new ref]         7d274fce26adc6f28bfd8d3ecfa35826fd52178d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7d274fc revise .cabal file