$ git clone -n https://src.fedoraproject.org/rpms/java-diff-utils.git /var/lib/mock/f41-build-1439213-23573/root/chroot_tmpdir/scmroot/java-diff-utils
Cloning into '/var/lib/mock/f41-build-1439213-23573/root/chroot_tmpdir/scmroot/java-diff-utils'...
$ git fetch origin ceff384c0c02fd1ee4c6e4450472cecc7d5eec18:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/java-diff-utils
 * [new ref]         ceff384c0c02fd1ee4c6e4450472cecc7d5eec18 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ceff384 Rebuilt for java-21-openjdk as system jdk