$ git clone -n https://src.fedoraproject.org/rpms/jaxb-api2.git /var/lib/mock/f40-build-1904674-25073/root/chroot_tmpdir/scmroot/jaxb-api2
Cloning into '/var/lib/mock/f40-build-1904674-25073/root/chroot_tmpdir/scmroot/jaxb-api2'...
$ git fetch origin 393254c001ae669234f61a16960fb3772cae157c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jaxb-api2
 * [new ref]         393254c001ae669234f61a16960fb3772cae157c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 393254c Rebuilt for java-21-openjdk as system jdk