$ git clone -n https://src.fedoraproject.org/rpms/jaxb-api2.git /var/lib/mock/f41-build-1283275-23209/root/chroot_tmpdir/scmroot/jaxb-api2
Cloning into '/var/lib/mock/f41-build-1283275-23209/root/chroot_tmpdir/scmroot/jaxb-api2'...
$ git fetch origin 8ab3d8f7617aa3e322bc28575aa91e4c9182cadc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jaxb-api2
 * [new ref]         8ab3d8f7617aa3e322bc28575aa91e4c9182cadc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8ab3d8f Rebuilt for java-21-openjdk as system jdk