$ git clone -n https://src.fedoraproject.org/rpms/rust-nu-parser.git /var/lib/mock/f41-build-side-1-3136890-39784/root/chroot_tmpdir/scmroot/rust-nu-parser
Cloning into '/var/lib/mock/f41-build-side-1-3136890-39784/root/chroot_tmpdir/scmroot/rust-nu-parser'...
$ git fetch origin 3e37b3a9b5ce791e2cd92b98a4b0499f27b8c255:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nu-parser
 * [new ref]         3e37b3a9b5ce791e2cd92b98a4b0499f27b8c255 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 3e37b3a Update to version 0.99.1