$ git clone -n https://src.fedoraproject.org/rpms/golang-github-gobs-pretty.git /var/lib/mock/f40-build-2691260-68125/root/chroot_tmpdir/scmroot/golang-github-gobs-pretty
Cloning into '/var/lib/mock/f40-build-2691260-68125/root/chroot_tmpdir/scmroot/golang-github-gobs-pretty'...
$ git fetch origin 0fd11c880aa3e52d0acb1c768b1568e3858f6f25:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-gobs-pretty
 * [new ref]         0fd11c880aa3e52d0acb1c768b1568e3858f6f25 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0fd11c8 Retired: Long term failure to build