$ git clone -n https://src.fedoraproject.org/rpms/rust-libpulse-sys.git /var/lib/mock/f41-build-side-1-3134847-39762/root/chroot_tmpdir/scmroot/rust-libpulse-sys
Cloning into '/var/lib/mock/f41-build-side-1-3134847-39762/root/chroot_tmpdir/scmroot/rust-libpulse-sys'...
$ git fetch origin 4372bfa623e081e806dfe0a9c70be302ecec1d5f:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-libpulse-sys
 * [new ref]         4372bfa623e081e806dfe0a9c70be302ecec1d5f -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4372bfa no longer needed