$ git clone -n https://src.fedoraproject.org/rpms/perl-Dancer2.git /var/lib/mock/f40-build-2016318-46178/root/chroot_tmpdir/scmroot/perl-Dancer2
Cloning into '/var/lib/mock/f40-build-2016318-46178/root/chroot_tmpdir/scmroot/perl-Dancer2'...
$ git fetch origin cd368661b75cf595fd2685dfc851203eb407ab92:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-Dancer2
 * [new ref]         cd368661b75cf595fd2685dfc851203eb407ab92 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at cd36866 Update to 1.0.0