$ git clone -n https://src.fedoraproject.org/rpms/dos2unix.git /var/lib/mock/f40-build-2217516-52554/root/chroot_tmpdir/scmroot/dos2unix
Cloning into '/var/lib/mock/f40-build-2217516-52554/root/chroot_tmpdir/scmroot/dos2unix'...
$ git fetch origin c223bd8e27e48fe93bea3a8cd6d815f53eac489e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/dos2unix
 * [new ref]         c223bd8e27e48fe93bea3a8cd6d815f53eac489e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c223bd8 Check gpg signature & other minor changes