$ git clone -n https://src.fedoraproject.org/rpms/rust-selinux.git /var/lib/mock/f45-build-44762-816/root/chroot_tmpdir/scmroot/rust-selinux
Cloning into '/var/lib/mock/f45-build-44762-816/root/chroot_tmpdir/scmroot/rust-selinux'...
$ git fetch origin f55af64cc14dda8f313fabf235deed0211d17f85:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-selinux
 * [new ref]         f55af64cc14dda8f313fabf235deed0211d17f85 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f55af64 Update to version 0.6.3; Resolves RHBZ#2496671