$ git clone -n https://src.fedoraproject.org/rpms/javacc-maven-plugin.git /var/lib/mock/f38-build-side-42-init-devel-784003-27946/root/chroot_tmpdir/scmroot/javacc-maven-plugin
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-784003-27946/root/chroot_tmpdir/scmroot/javacc-maven-plugin'...
$ git fetch origin 322e0ddec21dd34e2b3f5ef46a6f1c9c446dbe5d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/javacc-maven-plugin
 * [new ref]         322e0ddec21dd34e2b3f5ef46a6f1c9c446dbe5d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 322e0dd Version 3.0.1.  Convert License tag to SPDX.