$ git clone -n https://src.fedoraproject.org/rpms/quaternion.git /var/lib/mock/f40-build-2114492-50675/root/chroot_tmpdir/scmroot/quaternion
Cloning into '/var/lib/mock/f40-build-2114492-50675/root/chroot_tmpdir/scmroot/quaternion'...
$ git fetch origin 8e3ab26f777e3394a9f234c32815d17f5aa67928:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/quaternion
 * [new ref]         8e3ab26f777e3394a9f234c32815d17f5aa67928 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8e3ab26 Fix summary for the package to not mention Qt version