$ git clone -n https://src.fedoraproject.org/rpms/ostrichriders.git /var/lib/mock/f41-build-side-1-2650200-27568/root/chroot_tmpdir/scmroot/ostrichriders
Cloning into '/var/lib/mock/f41-build-side-1-2650200-27568/root/chroot_tmpdir/scmroot/ostrichriders'...
$ git fetch origin a191648a10197b7875d24a5e02314d8e8efef8b9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/ostrichriders
 * [new ref]         a191648a10197b7875d24a5e02314d8e8efef8b9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a191648 convert GPLv3+ license to SPDX