$ git clone -n https://src.fedoraproject.org/rpms/golang-gopkg-russross-blackfriday-1.git /var/lib/mock/f41-build-1036604-18741/root/chroot_tmpdir/scmroot/golang-gopkg-russross-blackfriday-1
Cloning into '/var/lib/mock/f41-build-1036604-18741/root/chroot_tmpdir/scmroot/golang-gopkg-russross-blackfriday-1'...
$ git fetch origin eb9f30e5ded941e5e430bd7b7481d4daf035cd8b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-gopkg-russross-blackfriday-1
 * [new ref]         eb9f30e5ded941e5e430bd7b7481d4daf035cd8b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at eb9f30e Fix FTBFS