$ git clone -n https://src.fedoraproject.org/rpms/golang-github-flynn-json5.git /var/lib/mock/f45-build-11912-436/root/chroot_tmpdir/scmroot/golang-github-flynn-json5
Cloning into '/var/lib/mock/f45-build-11912-436/root/chroot_tmpdir/scmroot/golang-github-flynn-json5'...
$ git fetch origin e9707b5c03bf674b40386e6a0facaf151791d5ec:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-flynn-json5
 * [new ref]         e9707b5c03bf674b40386e6a0facaf151791d5ec -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e9707b5 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild