$ git clone -n https://src.fedoraproject.org/rpms/ghc-mmap.git /var/lib/mock/f38-build-side-42-init-devel-959471-28787/root/chroot_tmpdir/scmroot/ghc-mmap
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-959471-28787/root/chroot_tmpdir/scmroot/ghc-mmap'...
$ git fetch origin 28572a60166b3f6bb2fd8e899d2f295a2b633883:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-mmap
 * [new ref]         28572a60166b3f6bb2fd8e899d2f295a2b633883 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 28572a6 Convert to %autorelease and %autochangelog