$ git clone -n https://src.fedoraproject.org/rpms/javapackages-tools.git /var/lib/mock/f39-build-1470332-33888/root/chroot_tmpdir/scmroot/javapackages-tools
Cloning into '/var/lib/mock/f39-build-1470332-33888/root/chroot_tmpdir/scmroot/javapackages-tools'...
$ git fetch origin b7284391073dbd4b67ac88d20b280becce64d384:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/javapackages-tools
 * [new ref]         b7284391073dbd4b67ac88d20b280becce64d384 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b728439 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild