$ git clone -n https://src.fedoraproject.org/rpms/rust-spki.git /var/lib/mock/f38-build-side-42-init-devel-1166634-30602/root/chroot_tmpdir/scmroot/rust-spki
Cloning into '/var/lib/mock/f38-build-side-42-init-devel-1166634-30602/root/chroot_tmpdir/scmroot/rust-spki'...
$ git fetch origin b476fd7008c41643c6953be1abf0e56cd80a1b98:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-spki
 * [new ref]         b476fd7008c41643c6953be1abf0e56cd80a1b98 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b476fd7 Update to version 0.7.2; Fixes RHBZ#2082964