$ git clone -n https://src.fedoraproject.org/rpms/jaxb-dtd-parser.git /var/lib/mock/f40-build-2694710-69161/root/chroot_tmpdir/scmroot/jaxb-dtd-parser
Cloning into '/var/lib/mock/f40-build-2694710-69161/root/chroot_tmpdir/scmroot/jaxb-dtd-parser'...
$ git fetch origin d619c280f93207288a0fdb0a516e25abbcff8024:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jaxb-dtd-parser
 * [new ref]         d619c280f93207288a0fdb0a516e25abbcff8024 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d619c28 Rebuilt for java-21-openjdk as system jdk