$ git clone -n https://src.fedoraproject.org/rpms/golang-github-xiang90-probing.git /var/lib/mock/f41-build-1044504-19025/root/chroot_tmpdir/scmroot/golang-github-xiang90-probing
Cloning into '/var/lib/mock/f41-build-1044504-19025/root/chroot_tmpdir/scmroot/golang-github-xiang90-probing'...
$ git fetch origin a4290bc58dbd097cb1dec250de853b97d8be7527:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/golang-github-xiang90-probing
 * [new ref]         a4290bc58dbd097cb1dec250de853b97d8be7527 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a4290bc Fix FTBFS