$ git clone -n https://src.fedoraproject.org/rpms/rust-pci-driver.git /var/lib/mock/f39-build-1494165-34542/root/chroot_tmpdir/scmroot/rust-pci-driver
Cloning into '/var/lib/mock/f39-build-1494165-34542/root/chroot_tmpdir/scmroot/rust-pci-driver'...
$ git fetch origin ea61b8f435db53e188e214c25a79f344b33b39db:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pci-driver
 * [new ref]         ea61b8f435db53e188e214c25a79f344b33b39db -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at ea61b8f Update to version 0.1.4; Fixes RHBZ#2228540