$ git clone -n https://src.fedoraproject.org/rpms/rust-udev.git /var/lib/mock/f39-build-1508857-35413/root/chroot_tmpdir/scmroot/rust-udev
Cloning into '/var/lib/mock/f39-build-1508857-35413/root/chroot_tmpdir/scmroot/rust-udev'...
$ git fetch origin 4b90cfcb680ef9cae16e6a1fc8d812528dde860a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-udev
 * [new ref]         4b90cfcb680ef9cae16e6a1fc8d812528dde860a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4b90cfc Initial import; Fixes: RHBZ#2224958