$ git clone -n https://src.fedoraproject.org/rpms/gphoto2.git /var/lib/mock/f39-build-1466021-33638/root/chroot_tmpdir/scmroot/gphoto2
Cloning into '/var/lib/mock/f39-build-1466021-33638/root/chroot_tmpdir/scmroot/gphoto2'...
$ git fetch origin 40794fdd55d1fe9f150a21e03339f87663565abb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/gphoto2
 * [new ref]         40794fdd55d1fe9f150a21e03339f87663565abb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 40794fd Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild