$ git clone -n https://src.fedoraproject.org/rpms/rust-mint.git /var/lib/mock/f45-build-43267-801/root/chroot_tmpdir/scmroot/rust-mint
Cloning into '/var/lib/mock/f45-build-43267-801/root/chroot_tmpdir/scmroot/rust-mint'...
$ git fetch origin bedca54404ba7445481aa0c358205f187f7b1c46:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-mint
 * [new ref]         bedca54404ba7445481aa0c358205f187f7b1c46 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at bedca54 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild