$ git clone -n https://src.fedoraproject.org/rpms/cups.git /var/lib/mock/f40-build-1134102-20405/root/chroot_tmpdir/scmroot/cups
Cloning into '/var/lib/mock/f40-build-1134102-20405/root/chroot_tmpdir/scmroot/cups'...
$ git fetch origin 0324fab374391b0c0425b98dbbf2d03cd76ca4ad:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/cups
 * [new ref]         0324fab374391b0c0425b98dbbf2d03cd76ca4ad -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 0324fab fix cgiGetTextfield() return value if the original value is invalid