$ git clone -n https://src.fedoraproject.org/rpms/maven-jar-plugin.git /var/lib/mock/f41-build-1104930-20066/root/chroot_tmpdir/scmroot/maven-jar-plugin
Cloning into '/var/lib/mock/f41-build-1104930-20066/root/chroot_tmpdir/scmroot/maven-jar-plugin'...
$ git fetch origin 0d81c8773c08832a02f991d1be4ed281e6fa2c37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-jar-plugin
 * [new ref]         0d81c8773c08832a02f991d1be4ed281e6fa2c37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0d81c87 Rebuilt for java-21-openjdk as system jdk