$ git clone -n https://src.fedoraproject.org/rpms/rust-serial_test_derive.git /var/lib/mock/f41-build-side-1-3134316-39731/root/chroot_tmpdir/scmroot/rust-serial_test_derive
Cloning into '/var/lib/mock/f41-build-side-1-3134316-39731/root/chroot_tmpdir/scmroot/rust-serial_test_derive'...
$ git fetch origin 58ba37c2096b44fa1b04dc87824892ba343a02c1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-serial_test_derive
 * [new ref]         58ba37c2096b44fa1b04dc87824892ba343a02c1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 58ba37c Update to version 3.2.0; Fixes RHBZ#2324744