$ git clone -n https://src.fedoraproject.org/rpms/R-rJava.git /var/lib/mock/f39-build-2341242-59733/root/chroot_tmpdir/scmroot/R-rJava
Cloning into '/var/lib/mock/f39-build-2341242-59733/root/chroot_tmpdir/scmroot/R-rJava'...
$ git fetch origin de2cbae2f15f4b86382151b33295ba9c5da7b131:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rJava
 * [new ref]         de2cbae2f15f4b86382151b33295ba9c5da7b131 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at de2cbae Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild