$ git clone -n https://src.fedoraproject.org/rpms/ctags.git /var/lib/mock/f42-build-863084-171404/root/chroot_tmpdir/scmroot/ctags
Cloning into '/var/lib/mock/f42-build-863084-171404/root/chroot_tmpdir/scmroot/ctags'...
$ git fetch origin d1aef79c9ccf7673cfaa91ed2a52c19606848688:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ctags
 * [new ref]         d1aef79c9ccf7673cfaa91ed2a52c19606848688 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d1aef79 update to 6.1.0