$ git clone -n https://src.fedoraproject.org/rpms/rust-nom7.git /var/lib/mock/f45-build-43394-802/root/chroot_tmpdir/scmroot/rust-nom7
Cloning into '/var/lib/mock/f45-build-43394-802/root/chroot_tmpdir/scmroot/rust-nom7'...
$ git fetch origin c987a5581ddee7cd54abc6ad3c9ee9663f68c641:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-nom7
 * [new ref]         c987a5581ddee7cd54abc6ad3c9ee9663f68c641 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at c987a55 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild