$ git clone -n https://src.fedoraproject.org/rpms/perl-DateTime.git /var/lib/mock/f45-build-22949-595/root/chroot_tmpdir/scmroot/perl-DateTime
Cloning into '/var/lib/mock/f45-build-22949-595/root/chroot_tmpdir/scmroot/perl-DateTime'...
$ git fetch origin a78c862503c534c5a80da31d7a1d97fcce170e71:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/perl-DateTime
 * [new ref]         a78c862503c534c5a80da31d7a1d97fcce170e71 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a78c862 Update to 1.67 (rhbz#2526041)