$ git clone -n https://src.fedoraproject.org/rpms/rust-take_mut.git /var/lib/mock/f45-build-45299-822/root/chroot_tmpdir/scmroot/rust-take_mut
Cloning into '/var/lib/mock/f45-build-45299-822/root/chroot_tmpdir/scmroot/rust-take_mut'...
$ git fetch origin 254ca644237d9d6a7f8f6f5d597d62afd6dd329a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-take_mut
 * [new ref]         254ca644237d9d6a7f8f6f5d597d62afd6dd329a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 254ca64 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild