$ git clone -n https://src.fedoraproject.org/rpms/libchamplain.git /var/lib/mock/f39-build-1591758-38297/root/chroot_tmpdir/scmroot/libchamplain
Cloning into '/var/lib/mock/f39-build-1591758-38297/root/chroot_tmpdir/scmroot/libchamplain'...
$ git fetch origin 39f654e4af6289ed75edfa5d81c60e500a2342ac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/libchamplain
 * [new ref]         39f654e4af6289ed75edfa5d81c60e500a2342ac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39f654e Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild