$ git clone -n https://src.fedoraproject.org/rpms/maven-mapping.git /var/lib/mock/f40-build-2541298-61876/root/chroot_tmpdir/scmroot/maven-mapping
Cloning into '/var/lib/mock/f40-build-2541298-61876/root/chroot_tmpdir/scmroot/maven-mapping'...
$ git fetch origin c7fe22dd0df094b092bcae578b066fc5374d8e5c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/maven-mapping
 * [new ref]         c7fe22dd0df094b092bcae578b066fc5374d8e5c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c7fe22d Rebuilt for java-21-openjdk as system jdk