$ git clone -n https://src.fedoraproject.org/rpms/exec-maven-plugin.git /var/lib/mock/f40-build-2679368-67930/root/chroot_tmpdir/scmroot/exec-maven-plugin
Cloning into '/var/lib/mock/f40-build-2679368-67930/root/chroot_tmpdir/scmroot/exec-maven-plugin'...
$ git fetch origin aaf956e00dd686c5aec3f8bc6213489f9d8aeeed:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/exec-maven-plugin
 * [new ref]         aaf956e00dd686c5aec3f8bc6213489f9d8aeeed -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at aaf956e Rebuilt for java-21-openjdk as system jdk