$ git clone -n https://src.fedoraproject.org/rpms/gnucash-docs.git /var/lib/mock/f40-build-2689077-68104/root/chroot_tmpdir/scmroot/gnucash-docs
Cloning into '/var/lib/mock/f40-build-2689077-68104/root/chroot_tmpdir/scmroot/gnucash-docs'...
$ git fetch origin 8abc5c637b74926e2d2315d1d9acdedd29275da8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gnucash-docs
 * [new ref]         8abc5c637b74926e2d2315d1d9acdedd29275da8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8abc5c6 5.6