$ git clone -n https://src.fedoraproject.org/rpms/c-icap-modules.git /var/lib/mock/f40-build-1992628-43613/root/chroot_tmpdir/scmroot/c-icap-modules
Cloning into '/var/lib/mock/f40-build-1992628-43613/root/chroot_tmpdir/scmroot/c-icap-modules'...
$ git fetch origin a90c8903d3e2f0d136624719a51b514086283d27:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/c-icap-modules
 * [new ref]         a90c8903d3e2f0d136624719a51b514086283d27 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at a90c890 Rebuild for updated c-icap