$ git clone -n https://src.fedoraproject.org/rpms/rust-peeking_take_while.git /var/lib/mock/f45-build-43765-805/root/chroot_tmpdir/scmroot/rust-peeking_take_while
Cloning into '/var/lib/mock/f45-build-43765-805/root/chroot_tmpdir/scmroot/rust-peeking_take_while'...
$ git fetch origin 682ea92dad2e3955257098f7032d57d136acf6a9:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-peeking_take_while
 * [new ref]         682ea92dad2e3955257098f7032d57d136acf6a9 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 682ea92 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild