$ git clone -n https://src.fedoraproject.org/rpms/rust-plist.git /var/lib/mock/f42-build-side-1-3583549-46889/root/chroot_tmpdir/scmroot/rust-plist
Cloning into '/var/lib/mock/f42-build-side-1-3583549-46889/root/chroot_tmpdir/scmroot/rust-plist'...
$ git fetch origin f3f0f9fbd3337c1c3c0cd7142f612139a0bc59f1:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-plist
 * [new ref]         f3f0f9fbd3337c1c3c0cd7142f612139a0bc59f1 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at f3f0f9f Update to version 1.7.2; Fixes RHBZ#2372359