$ git clone -n https://src.fedoraproject.org/rpms/jaxb-stax-ex.git /var/lib/mock/f39-build-1567803-37600/root/chroot_tmpdir/scmroot/jaxb-stax-ex
Cloning into '/var/lib/mock/f39-build-1567803-37600/root/chroot_tmpdir/scmroot/jaxb-stax-ex'...
$ git fetch origin dc7c9ea3a130d7464985d88b2145ed6783450c16:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/jaxb-stax-ex
 * [new ref]         dc7c9ea3a130d7464985d88b2145ed6783450c16 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at dc7c9ea Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild