$ git clone -n https://src.fedoraproject.org/rpms/rust-trust-dns-recursor.git /var/lib/mock/f38-build-side-43-rust-devel-1414780-31450/root/chroot_tmpdir/scmroot/rust-trust-dns-recursor
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1414780-31450/root/chroot_tmpdir/scmroot/rust-trust-dns-recursor'...
$ git fetch origin 2dae240f3351c6f5a5febf4fc53b29af8431eda8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-trust-dns-recursor
 * [new ref]         2dae240f3351c6f5a5febf4fc53b29af8431eda8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 2dae240 Initial import (#2187780)