$ git clone -n https://src.fedoraproject.org/rpms/rust-mailparse.git /var/lib/mock/f40-build-2037836-48131/root/chroot_tmpdir/scmroot/rust-mailparse
Cloning into '/var/lib/mock/f40-build-2037836-48131/root/chroot_tmpdir/scmroot/rust-mailparse'...
$ git fetch origin 283d0fba99b3f64058bdad661aa95ff12a4934ab:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mailparse
 * [new ref]         283d0fba99b3f64058bdad661aa95ff12a4934ab -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 283d0fb Update to version 0.14.0; Fixes RHBZ#2151089