$ git clone -n https://src.fedoraproject.org/rpms/R-rJava.git /var/lib/mock/f42-build-3530694-46321/root/chroot_tmpdir/scmroot/R-rJava
Cloning into '/var/lib/mock/f42-build-3530694-46321/root/chroot_tmpdir/scmroot/R-rJava'...
$ git fetch origin a44322011f000374daf09c9916a9d3954b5e3c51:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rJava
 * [new ref]         a44322011f000374daf09c9916a9d3954b5e3c51 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a443220 Merge branch 'epel9' into rawhide