$ git clone -n https://src.fedoraproject.org/rpms/synfig.git /var/lib/mock/f39-build-1888427-42789/root/chroot_tmpdir/scmroot/synfig
Cloning into '/var/lib/mock/f39-build-1888427-42789/root/chroot_tmpdir/scmroot/synfig'...
$ git fetch origin 3c454d62ce4c5ecb3588fb748dc21c8dd6c3c010:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/synfig
 * [new ref]         3c454d62ce4c5ecb3588fb748dc21c8dd6c3c010 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3c454d6 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild