$ git clone -n https://src.fedoraproject.org/rpms/rust-picky-krb.git /var/lib/mock/f45-build-43852-807/root/chroot_tmpdir/scmroot/rust-picky-krb
Cloning into '/var/lib/mock/f45-build-43852-807/root/chroot_tmpdir/scmroot/rust-picky-krb'...
$ git fetch origin b0d689a220ef4bd6e57012c5469cf4068c7c8034:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-picky-krb
 * [new ref]         b0d689a220ef4bd6e57012c5469cf4068c7c8034 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at b0d689a Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild