$ git clone -n https://src.fedoraproject.org/rpms/R-xml2.git /var/lib/mock/f39-build-1544872-36671/root/chroot_tmpdir/scmroot/R-xml2
Cloning into '/var/lib/mock/f39-build-1544872-36671/root/chroot_tmpdir/scmroot/R-xml2'...
$ git fetch origin 5a2d2cf844f2e52fe9ed46597439dea50168e4fb:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-xml2
 * [new ref]         5a2d2cf844f2e52fe9ed46597439dea50168e4fb -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 5a2d2cf Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild