$ git clone -n https://src.fedoraproject.org/rpms/rust-av-metrics.git /var/lib/mock/f38-build-side-42-init-devel-1392700-30946/root/chroot_tmpdir/scmroot/rust-av-metrics
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1392700-30946/root/chroot_tmpdir/scmroot/rust-av-metrics'...
$ git fetch origin 4123018eb43d6378e7781742d3e15dbe739a7708:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-av-metrics
 * [new ref]         4123018eb43d6378e7781742d3e15dbe739a7708 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4123018 Update to version 0.9.1; Fixes RHBZ#2067947