$ git clone -n https://src.fedoraproject.org/rpms/golang-x-oauth2.git /var/lib/mock/f40-build-2246399-53810/root/chroot_tmpdir/scmroot/golang-x-oauth2
Cloning into '/var/lib/mock/f40-build-2246399-53810/root/chroot_tmpdir/scmroot/golang-x-oauth2'...
$ git fetch origin ad9f719f729c1374bdb4a87b036d39a368fa94d3:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-x-oauth2
 * [new ref]         ad9f719f729c1374bdb4a87b036d39a368fa94d3 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ad9f719 Update to 0.16.0 - Closes rhbz#2248945