$ git clone -n https://src.fedoraproject.org/rpms/R-IRanges.git /var/lib/mock/f39-build-1539150-36417/root/chroot_tmpdir/scmroot/R-IRanges
Cloning into '/var/lib/mock/f39-build-1539150-36417/root/chroot_tmpdir/scmroot/R-IRanges'...
$ git fetch origin 9af753ee9d0abcf72649f3fa0e367524a7c20cd0:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-IRanges
 * [new ref]         9af753ee9d0abcf72649f3fa0e367524a7c20cd0 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9af753e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild