$ git clone -n https://src.fedoraproject.org/rpms/rust-vhost-user-backend.git /var/lib/mock/f38-build-side-43-rust-devel-1398635-31110/root/chroot_tmpdir/scmroot/rust-vhost-user-backend
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1398635-31110/root/chroot_tmpdir/scmroot/rust-vhost-user-backend'...
$ git fetch origin 168ecb179fb85871d53bb5fe360066806fc20417:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vhost-user-backend
 * [new ref]         168ecb179fb85871d53bb5fe360066806fc20417 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 168ecb1 Update to version 0.10.1; Fixes RHBZ#2233423