$ git clone -n https://src.fedoraproject.org/rpms/R-webutils.git /var/lib/mock/f38-build-724684-99479/root/chroot_tmpdir/scmroot/R-webutils
Cloning into '/var/lib/mock/f38-build-724684-99479/root/chroot_tmpdir/scmroot/R-webutils'...
$ git fetch origin 60e90d8f43412a4216025603fb79527a045da577:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-webutils
 * [new ref]         60e90d8f43412a4216025603fb79527a045da577 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 60e90d8 R-maint-sig mass rebuild