$ git clone -n https://src.fedoraproject.org/rpms/rust-plist.git /var/lib/mock/f45-build-43942-809/root/chroot_tmpdir/scmroot/rust-plist
Cloning into '/var/lib/mock/f45-build-43942-809/root/chroot_tmpdir/scmroot/rust-plist'...
$ git fetch origin 83b00142cb812a11089938a8f2cbc12e89290e37:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-plist
 * [new ref]         83b00142cb812a11089938a8f2cbc12e89290e37 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 83b0014 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild