$ git clone -n https://src.fedoraproject.org/rpms/ghc-html.git /var/lib/mock/f40-build-1998002-44200/root/chroot_tmpdir/scmroot/ghc-html
Cloning into '/var/lib/mock/f40-build-1998002-44200/root/chroot_tmpdir/scmroot/ghc-html'...
$ git fetch origin 59691fd92e55570b7a04a887b5422dd4b8827a41:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-html
 * [new ref]         59691fd92e55570b7a04a887b5422dd4b8827a41 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 59691fd bump release