$ git clone -n https://src.fedoraproject.org/rpms/R-igraph.git /var/lib/mock/f40-build-2053177-49093/root/chroot_tmpdir/scmroot/R-igraph
Cloning into '/var/lib/mock/f40-build-2053177-49093/root/chroot_tmpdir/scmroot/R-igraph'...
$ git fetch origin b5f5706a12c6dd0ba7cd8f3fe6fe3427443d8622:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/R-igraph
 * [new ref]         b5f5706a12c6dd0ba7cd8f3fe6fe3427443d8622 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b5f5706 Rebuilt for https://fedoraproject.org/wiki/Fedora_39_Mass_Rebuild