$ git clone -n https://src.fedoraproject.org/rpms/ghc-filemanip.git /var/lib/mock/f38-build-side-42-init-devel-595976-26162/root/chroot_tmpdir/scmroot/ghc-filemanip
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-595976-26162/root/chroot_tmpdir/scmroot/ghc-filemanip'...
$ git fetch origin c680c800decb760612f36cdcfd1e3b94d096a975:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ghc-filemanip
 * [new ref]         c680c800decb760612f36cdcfd1e3b94d096a975 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c680c80 Convert to %autorelease and %autochangelog