$ git clone -n https://src.fedoraproject.org/rpms/rust-gethostname0.2.git /var/lib/mock/f40-build-2656810-66915/root/chroot_tmpdir/scmroot/rust-gethostname0.2
Cloning into '/var/lib/mock/f40-build-2656810-66915/root/chroot_tmpdir/scmroot/rust-gethostname0.2'...
$ git fetch origin 3e680847b827285c297b6bf2cc5cc54420d9598a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-gethostname0.2
 * [new ref]         3e680847b827285c297b6bf2cc5cc54420d9598a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e68084 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild