$ git clone -n https://src.fedoraproject.org/rpms/rust-pbkdf2_0.11.git /var/lib/mock/f38-build-side-42-init-devel-1085718-30004/root/chroot_tmpdir/scmroot/rust-pbkdf2_0.11
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1085718-30004/root/chroot_tmpdir/scmroot/rust-pbkdf2_0.11'...
$ git fetch origin c012cbb2776cf685976e520dbe8f3921357f2206:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-pbkdf2_0.11
 * [new ref]         c012cbb2776cf685976e520dbe8f3921357f2206 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c012cbb Initial import (pbkdf2 0.11 compat package)