$ git clone -n https://src.fedoraproject.org/rpms/R-prettyunits.git /var/lib/mock/f39-build-1470599-33906/root/chroot_tmpdir/scmroot/R-prettyunits
Cloning into '/var/lib/mock/f39-build-1470599-33906/root/chroot_tmpdir/scmroot/R-prettyunits'...
$ git fetch origin 4bd86e7cd8d4945234fd1d49115e3be9a932aed8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-prettyunits
 * [new ref]         4bd86e7cd8d4945234fd1d49115e3be9a932aed8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4bd86e7 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild