$ git clone -n https://src.fedoraproject.org/rpms/golang-gopkg-macaroon2.git /var/lib/mock/f45-build-12725-443/root/chroot_tmpdir/scmroot/golang-gopkg-macaroon2
Cloning into '/var/lib/mock/f45-build-12725-443/root/chroot_tmpdir/scmroot/golang-gopkg-macaroon2'...
$ git fetch origin 2de46ffe452d17a9d39039bd9ff61844a4195e8f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-gopkg-macaroon2
 * [new ref]         2de46ffe452d17a9d39039bd9ff61844a4195e8f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2de46ff Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild