$ git clone -n https://src.fedoraproject.org/rpms/golang-github-cloudflare-circl.git /var/lib/mock/f42-build-867124-174637/root/chroot_tmpdir/scmroot/golang-github-cloudflare-circl
Cloning into '/var/lib/mock/f42-build-867124-174637/root/chroot_tmpdir/scmroot/golang-github-cloudflare-circl'...
$ git fetch origin 43a6c6e64f96270ba8fec62c6da6316a16038cc9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-cloudflare-circl
 * [new ref]         43a6c6e64f96270ba8fec62c6da6316a16038cc9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43a6c6e Update to 1.5.0 - Closes rhbz#2277152