$ git clone -n https://src.fedoraproject.org/rpms/crash.git /var/lib/mock/f41-build-2623923-25573/root/chroot_tmpdir/scmroot/crash
Cloning into '/var/lib/mock/f41-build-2623923-25573/root/chroot_tmpdir/scmroot/crash'...
$ git fetch origin c9eb21048c241f56ea65698f16de6febf8e36b38:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/crash
 * [new ref]         c9eb21048c241f56ea65698f16de6febf8e36b38 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c9eb210 Update to the latest commit <79b93ecb2e72>