$ git clone -n https://src.fedoraproject.org/rpms/jakarta-json.git /var/lib/mock/f41-build-1049328-19179/root/chroot_tmpdir/scmroot/jakarta-json
Cloning into '/var/lib/mock/f41-build-1049328-19179/root/chroot_tmpdir/scmroot/jakarta-json'...
$ git fetch origin 7a68bdf81f32095ffcbeb0577e65ec334505160f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-json
 * [new ref]         7a68bdf81f32095ffcbeb0577e65ec334505160f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 7a68bdf Rebuilt for java-21-openjdk as system jdk