$ git clone -n https://src.fedoraproject.org/rpms/rust-vmm-sys-util.git /var/lib/mock/f45-build-46098-830/root/chroot_tmpdir/scmroot/rust-vmm-sys-util
Cloning into '/var/lib/mock/f45-build-46098-830/root/chroot_tmpdir/scmroot/rust-vmm-sys-util'...
$ git fetch origin fa1ab3e5017bc04a7e9888d23c7452639dbe8373:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-vmm-sys-util
 * [new ref]         fa1ab3e5017bc04a7e9888d23c7452639dbe8373 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at fa1ab3e Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild