$ git clone -n https://src.fedoraproject.org/rpms/glibd.git /var/lib/mock/f38-build-side-42-init-devel-1001312-29287/root/chroot_tmpdir/scmroot/glibd
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1001312-29287/root/chroot_tmpdir/scmroot/glibd'...
$ git fetch origin f5e79988f30a68e224047e909a962d1a4c893b10:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/glibd
 * [new ref]         f5e79988f30a68e224047e909a962d1a4c893b10 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f5e7998 Rebuilt for ldc 1.32