$ git clone -n https://src.fedoraproject.org/rpms/R-rsconnect.git /var/lib/mock/f42-build-side-1-3562183-46722/root/chroot_tmpdir/scmroot/R-rsconnect
Cloning into '/var/lib/mock/f42-build-side-1-3562183-46722/root/chroot_tmpdir/scmroot/R-rsconnect'...
$ git fetch origin 838648a230a7ef449180b4ee41022d537f363477:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-rsconnect
 * [new ref]         838648a230a7ef449180b4ee41022d537f363477 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 838648a R-maint-sig mass rebuild