$ git clone -n https://src.fedoraproject.org/rpms/fedora-distro-aliases.git /var/lib/mock/f45-build-8854-396/root/chroot_tmpdir/scmroot/fedora-distro-aliases
Cloning into '/var/lib/mock/f45-build-8854-396/root/chroot_tmpdir/scmroot/fedora-distro-aliases'...
$ git fetch origin 8c3720995e1c845a52c8c36ae19e81b79f45f76a:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/fedora-distro-aliases
 * [new ref]         8c3720995e1c845a52c8c36ae19e81b79f45f76a -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8c37209 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild