$ git clone -n https://src.fedoraproject.org/rpms/golang-github-shogo82148-shuffle.git /var/lib/mock/f41-build-1036371-18724/root/chroot_tmpdir/scmroot/golang-github-shogo82148-shuffle
Cloning into '/var/lib/mock/f41-build-1036371-18724/root/chroot_tmpdir/scmroot/golang-github-shogo82148-shuffle'...
$ git fetch origin 64d79e3065d2e4fde4b29aeef9c9e7dc1ebd0d62:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-shogo82148-shuffle
 * [new ref]         64d79e3065d2e4fde4b29aeef9c9e7dc1ebd0d62 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 64d79e3 Fix FTBFS