$ git clone -n https://src.fedoraproject.org/rpms/rust-value-bag.git /var/lib/mock/f38-build-side-43-rust-devel-1412407-31443/root/chroot_tmpdir/scmroot/rust-value-bag
Cloning into '/var/lib/mock/f38-build-side-43-rust-devel-1412407-31443/root/chroot_tmpdir/scmroot/rust-value-bag'...
$ git fetch origin 1621a218d0fe050569ea47e40c13020ba493152e:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-value-bag
 * [new ref]         1621a218d0fe050569ea47e40c13020ba493152e -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1621a21 Update to version 1.4.1; Fixes RHBZ#2182546