$ git clone -n https://src.fedoraproject.org/rpms/rust-humansize1.git /var/lib/mock/f38-build-side-43-rust-devel-1411645-31436/root/chroot_tmpdir/scmroot/rust-humansize1
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1411645-31436/root/chroot_tmpdir/scmroot/rust-humansize1'...
$ git fetch origin 9c0080f95de959164d6d20593f76f6d4e44f4446:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-humansize1
 * [new ref]         9c0080f95de959164d6d20593f76f6d4e44f4446 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 9c0080f Initial import (humansize 1 compat package)