$ git clone -n https://src.fedoraproject.org/rpms/rust-pbkdf2_0.10.git /var/lib/mock/f38-build-side-42-init-devel-850517-28425/root/chroot_tmpdir/scmroot/rust-pbkdf2_0.10
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-850517-28425/root/chroot_tmpdir/scmroot/rust-pbkdf2_0.10'...
$ git fetch origin 6d87be1f8fc024f09382b25045ddf70849077e09:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pbkdf2_0.10
 * [new ref]         6d87be1f8fc024f09382b25045ddf70849077e09 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 6d87be1 Initial import (pbkdf2 0.10 compat package)