$ git clone -n https://src.fedoraproject.org/rpms/rust-coreos-installer.git /var/lib/mock/f40-build-2143648-50854/root/chroot_tmpdir/scmroot/rust-coreos-installer
Cloning into '/var/lib/mock/f40-build-2143648-50854/root/chroot_tmpdir/scmroot/rust-coreos-installer'...
$ git fetch origin 4a3792be12f6b295f5ae70006eb720dfea686779:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-coreos-installer
 * [new ref]         4a3792be12f6b295f5ae70006eb720dfea686779 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 4a3792b [packit] 0.20.0 upstream release