$ git clone -n https://src.fedoraproject.org/rpms/rust-pin-project-internal0.4.git /var/lib/mock/f41-build-side-1-3134884-39763/root/chroot_tmpdir/scmroot/rust-pin-project-internal0.4
Cloning into '/var/lib/mock/f41-build-side-1-3134884-39763/root/chroot_tmpdir/scmroot/rust-pin-project-internal0.4'...
$ git fetch origin 4b2afda30e85b223fc8c87f84663c6b0a89c5a7c:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pin-project-internal0.4
 * [new ref]         4b2afda30e85b223fc8c87f84663c6b0a89c5a7c -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b2afda compat package no longer needed