$ git clone -n https://src.fedoraproject.org/rpms/isoimagewriter.git /var/lib/mock/f39-build-1625028-39123/root/chroot_tmpdir/scmroot/isoimagewriter
Cloning into '/var/lib/mock/f39-build-1625028-39123/root/chroot_tmpdir/scmroot/isoimagewriter'...
$ git fetch origin 1accdb2497f887c2da324eb665c93a91c29fbaf7:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/isoimagewriter
 * [new ref]         1accdb2497f887c2da324eb665c93a91c29fbaf7 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1accdb2 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild