$ git clone -n https://src.fedoraproject.org/rpms/R-shiny.git /var/lib/mock/f39-build-1587082-38214/root/chroot_tmpdir/scmroot/R-shiny
Cloning into '/var/lib/mock/f39-build-1587082-38214/root/chroot_tmpdir/scmroot/R-shiny'...
$ git fetch origin ca2377fa2f3f0688a2c37a2e2dde6408fb2d5d20:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-shiny
 * [new ref]         ca2377fa2f3f0688a2c37a2e2dde6408fb2d5d20 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ca2377f Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild