$ git clone -n https://src.fedoraproject.org/rpms/glibd.git /var/lib/mock/f41-build-855543-167165/root/chroot_tmpdir/scmroot/glibd
Cloning into '/var/lib/mock/f41-build-855543-167165/root/chroot_tmpdir/scmroot/glibd'...
$ git fetch origin 123f90a3805881e4998c72151e26efbd8e552b61:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glibd
 * [new ref]         123f90a3805881e4998c72151e26efbd8e552b61 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 123f90a Rebuilt for ldc 1.39