$ git clone -n https://src.fedoraproject.org/rpms/shaderc.git /var/lib/mock/f41-build-857020-167860/root/chroot_tmpdir/scmroot/shaderc
Cloning into '/var/lib/mock/f41-build-857020-167860/root/chroot_tmpdir/scmroot/shaderc'...
$ git fetch origin e2ea6da7a43e755f3e06d5b3179261b335209a3d:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/shaderc
 * [new ref]         e2ea6da7a43e755f3e06d5b3179261b335209a3d -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at e2ea6da Update to 1.3.296.0 SDK