$ git clone -n https://src.fedoraproject.org/rpms/rust-h2.git /var/lib/mock/f40-build-2325314-58806/root/chroot_tmpdir/scmroot/rust-h2
Cloning into '/var/lib/mock/f40-build-2325314-58806/root/chroot_tmpdir/scmroot/rust-h2'...
$ git fetch origin 4b644f865d0008ac599346d5fa0ba7b71300c92f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-h2
 * [new ref]         4b644f865d0008ac599346d5fa0ba7b71300c92f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b644f8 Rebuilt for https://fedoraproject.org/wiki/Fedora_40_Mass_Rebuild