$ git clone -n https://src.fedoraproject.org/rpms/glslang.git /var/lib/mock/f41-build-850191-165157/root/chroot_tmpdir/scmroot/glslang
Cloning into '/var/lib/mock/f41-build-850191-165157/root/chroot_tmpdir/scmroot/glslang'...
$ git fetch origin 90e8f34cefb4675929f14b7d646c20630af77a13:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glslang
 * [new ref]         90e8f34cefb4675929f14b7d646c20630af77a13 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 90e8f34 Remove OGLCompiler and HLSL from pkgconfig