$ git clone -n https://src.fedoraproject.org/rpms/jakarta-json.git /var/lib/mock/f38-build-side-42-init-devel-676998-26691/root/chroot_tmpdir/scmroot/jakarta-json
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-676998-26691/root/chroot_tmpdir/scmroot/jakarta-json'...
$ git fetch origin 92a92f497b3387fd0b7393e83a1b5db0a93f8847:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jakarta-json
 * [new ref]         92a92f497b3387fd0b7393e83a1b5db0a93f8847 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 92a92f4 Remove dependency on buildnumber-maven-plugin.