$ git clone -n https://src.fedoraproject.org/rpms/ghc-free.git /var/lib/mock/f38-build-side-42-init-devel-825753-28363/root/chroot_tmpdir/scmroot/ghc-free
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-825753-28363/root/chroot_tmpdir/scmroot/ghc-free'...
$ git fetch origin e974cf219b1f2d03b975b56862716b022e769aca:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-free
 * [new ref]         e974cf219b1f2d03b975b56862716b022e769aca -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e974cf2 Convert to %autorelease and %autochangelog