$ git clone -n https://src.fedoraproject.org/rpms/age.git /var/lib/mock/f42-build-866976-174619/root/chroot_tmpdir/scmroot/age
Cloning into '/var/lib/mock/f42-build-866976-174619/root/chroot_tmpdir/scmroot/age'...
$ git fetch origin 065a1cbe1e5099b21aeab15e1dc802b1d5fb81fa:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/age
 * [new ref]         065a1cbe1e5099b21aeab15e1dc802b1d5fb81fa -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 065a1cb Update to 1.2.1 - Closes rhbz#2333048