$ git clone -n https://src.fedoraproject.org/rpms/rust-vhost.git /var/lib/mock/f40-build-2233252-53367/root/chroot_tmpdir/scmroot/rust-vhost
Cloning into '/var/lib/mock/f40-build-2233252-53367/root/chroot_tmpdir/scmroot/rust-vhost'...
$ git fetch origin 3ea3c7ba650bf026c06a530bc9e6b8c11c66725f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vhost
 * [new ref]         3ea3c7ba650bf026c06a530bc9e6b8c11c66725f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3ea3c7b Update to version 0.10.0; Fixes RHBZ#2248535