$ git clone -n https://src.fedoraproject.org/rpms/rust-appdirs.git /var/lib/mock/f45-build-40081-767/root/chroot_tmpdir/scmroot/rust-appdirs
Cloning into '/var/lib/mock/f45-build-40081-767/root/chroot_tmpdir/scmroot/rust-appdirs'...
$ git fetch origin 39ee263a360af48190216ddef0a806d71d268cc8:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/rust-appdirs
 * [new ref]         39ee263a360af48190216ddef0a806d71d268cc8 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 39ee263 Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild