$ git clone -n https://src.fedoraproject.org/rpms/rust-gethostname.git /var/lib/mock/f40-build-2712870-72086/root/chroot_tmpdir/scmroot/rust-gethostname
Cloning into '/var/lib/mock/f40-build-2712870-72086/root/chroot_tmpdir/scmroot/rust-gethostname'...
$ git fetch origin 27a524f7d8293406b6e62c4fe691ef3d815e9dac:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gethostname
 * [new ref]         27a524f7d8293406b6e62c4fe691ef3d815e9dac -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 27a524f Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild