$ git clone -n https://src.fedoraproject.org/rpms/jackson-parent.git /var/lib/mock/f39-build-1505810-35163/root/chroot_tmpdir/scmroot/jackson-parent
Cloning into '/var/lib/mock/f39-build-1505810-35163/root/chroot_tmpdir/scmroot/jackson-parent'...
$ git fetch origin 19c2742d35f87c0e0f1fda374c3ff47773beb24c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jackson-parent
 * [new ref]         19c2742d35f87c0e0f1fda374c3ff47773beb24c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 19c2742 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild