$ git clone -n https://src.fedoraproject.org/rpms/R-odbc.git /var/lib/mock/f38-build-724235-99404/root/chroot_tmpdir/scmroot/R-odbc
Cloning into '/var/lib/mock/f38-build-724235-99404/root/chroot_tmpdir/scmroot/R-odbc'...
$ git fetch origin d85c32fd71f29b877ec52977bab90481b3b07fcc:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-odbc
 * [new ref]         d85c32fd71f29b877ec52977bab90481b3b07fcc -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at d85c32f R-maint-sig mass rebuild