$ git clone -n https://src.fedoraproject.org/rpms/R-Cairo.git /var/lib/mock/f40-build-789266-135696/root/chroot_tmpdir/scmroot/R-Cairo
Cloning into '/var/lib/mock/f40-build-789266-135696/root/chroot_tmpdir/scmroot/R-Cairo'...
$ git fetch origin 716c58a5d932c1070fbb171766860bc18bc1698b:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-Cairo
 * [new ref]         716c58a5d932c1070fbb171766860bc18bc1698b -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 716c58a Rebuild for ICU 74