$ git clone -n https://src.fedoraproject.org/rpms/socnetv.git /var/lib/mock/f45-build-36210-702/root/chroot_tmpdir/scmroot/socnetv
Cloning into '/var/lib/mock/f45-build-36210-702/root/chroot_tmpdir/scmroot/socnetv'...
$ git fetch origin a5a64b317ca63a1444712bc8c4439ed2f2c2580e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/socnetv
 * [new ref]         a5a64b317ca63a1444712bc8c4439ed2f2c2580e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a5a64b3 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild