$ git clone -n https://src.fedoraproject.org/rpms/gnucash-docs.git /var/lib/mock/f40-build-1463763-23595/root/chroot_tmpdir/scmroot/gnucash-docs
Cloning into '/var/lib/mock/f40-build-1463763-23595/root/chroot_tmpdir/scmroot/gnucash-docs'...
$ git fetch origin fcc41e0da448669772ab13ee63f59b8329934fc0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnucash-docs
 * [new ref]         fcc41e0da448669772ab13ee63f59b8329934fc0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fcc41e0 5.8