$ git clone -n https://src.fedoraproject.org/rpms/rust-tree_magic_mini.git /var/lib/mock/f40-build-2644140-66496/root/chroot_tmpdir/scmroot/rust-tree_magic_mini
Cloning into '/var/lib/mock/f40-build-2644140-66496/root/chroot_tmpdir/scmroot/rust-tree_magic_mini'...
$ git fetch origin 43e95299567cef43292217b0c215943e3d88cd5f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-tree_magic_mini
 * [new ref]         43e95299567cef43292217b0c215943e3d88cd5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 43e9529 Update to version 3.1.4; Fixes RHBZ#2269616