$ git clone -n https://src.fedoraproject.org/rpms/golang-github-smartystreets-goconvey.git /var/lib/mock/f40-build-2484579-61639/root/chroot_tmpdir/scmroot/golang-github-smartystreets-goconvey
Cloning into '/var/lib/mock/f40-build-2484579-61639/root/chroot_tmpdir/scmroot/golang-github-smartystreets-goconvey'...
$ git fetch origin 3254362d29b77e7e0c14a4e5e23afa9858530983:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-smartystreets-goconvey
 * [new ref]         3254362d29b77e7e0c14a4e5e23afa9858530983 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3254362 Fix FTBFS - Closes rhbz#2225879 rhbz#2171540